In the near future, a financial crisis will hit Korea and slums arise. From those areas, a group of young people commit crime to survive.

Three different swordsmen -- a swordsman who is going blind, the best swordsman in Joseon Dynasty, and the best swordsman in Qing Dynasty who aspires to be the best even in the Joseon Dynasty -- meet each other for their own reasons.

Seo-Jin is a popular architect. He suffers from a trauma when his younger sister Yoo-Jin went missing. 25 years after her disappearance, Yoo-Jin comes back to her family. Seo-Jin feels something is not right with Yoo-Jin.

The rapid spread of an unknown infection has left an entire city in ungovernable chaos, but one survivor remains alive in isolation. It is his story.

An extraordinary road to emotional healing opens up for an antisocial children's book writer and a selfless psych ward caretaker when they cross paths.